Piston-rod packing.



No. 818,653. Y PATBNTED APR. 24, 1906. B. BADER. PIsToN ROD PACKINGAPPLICATION FILED MAY 19, 1905.

UNTTED STATES PATENT OFFICE.

PISTON-ROD PACKING.

Specification of Letters Patent.

Patented April 24, 1906.

Application filed May 19, 1905- Serial N0. 261,153.

T0 all whom, it may con/cern,.-

Be it known that I, EDWARD BADER, a citizen of the United States,residing at the city of St. Louis, State of Missouri, have invented acertain new and useful Piston-Rod Packing, of which the following' issuch a full, clear, and exact description as will enable any one skilledin the art to which it appertains to make and use the same, referencebeing had to the accompanying drawings, forming part of thisspecification.

My invention relates to a packing for piston-rods or the like, and moreparticularly to that class of packing known as metallic packing.

The object of my invention is to provide a packing which while simple inconstruction will be eflicient and durable in operation.

In the accompanying drawings, which illustrate a packing made inaccordance with my invention, together with a portion of the cylinder ofan engine, to which the same is applied, Figure 1 is a centrallongitudinal section through the end of the cylinder. Fig. 2 is an endview showing a number of the expansible packing-rings used in my device.F ig. 3 is an end view of the casing, the pistonrod being shown insection; and Fig. 4 is an enlarged view of a portion of one part of thecasing, two pairs of the packing-rings being shown in section.

Like marks of reference refer to similar parts in the several viewsofthe drawings.

5 represents the head of the cylinder of an engine to which my packingis applied.

6 is a stu'lling-box which, as shown in Fig. 1, is formed integral withthe piston-head 5.

7 is the gland which cooperates with the stul'ling-box 6. Thestufl'ing-box 6 is provided with lugs 8 and the glands 7 with lugs 9.The gland is secured in position by means of bolts 10, which passthrough plain openings in the lugs 9 and are screwed into threadedopenings in the lugs 8.

11 is the piston-rod of the engine.

All the above parts may be of any usual form.

The casing of my packing is formed of two parts 14 and 15, which aresimilar, except that the part 14 is provided with plain openings and thepart 15 with threaded openings, so that the two parts may be securedtogether by means of bolts or screws 16, preferably four in number, asshown in the drawings. It is essential that there should be nolongitudinal movement between the parts 14 and 15 of the casing, and itis not practical to absolutely prevent such movement by means of thescrews 1G. Consequently l provide the casing with a pair of semicircularsplines 17, which are let into the parts 14 and 15 of the casing acrossthe adjoining line of the two parts, one preferably being placed nearone end at one side and the other near the other end at the oppositeside, as best shown in Fig. 1. W'ithin the casing I provide a number ofannular grooves 18, preferably three in number. Each of these grooves 18is formed partly in the part 15 and partly in the part 14. The purposeof the splines 17, hereinbefore described, is to secure the exactalinement of these grooves 18. In each of the grooves 18 I provide apair of expansible packing-rings. Each of these .rings consists of threeseparable parts 2() and three connecting-pieces 21. Each of the parts 2Ois curved on its inner face, so as to conform to a portion of thepiston-rod 11. The three parts 20 when in position should be somewhatseparated, as best shown in Fig. 2. Each of the parts 20 is providedadjacent to its end with a flat bearing-surface 22, and each or theconnecting-pieces 21 has a Vflat bearing-surface 23, which bears upontwo of the aforesaid bearing-surfaces 22. The parts 20 are held firmlyagainst the piston-rod and the parts 21 against the parts 20 by means ofan annular' coiled spring 24, which lits in a groove 25, formed in thesaid parts. The two rings of each pair are placed, as best shown in Fig,2, so that the joints in one ring will be opposite the solid parts ofthe adjacent ring, and consequently a perfect steamtight joint will beformed. One of the rings of each pair is provided with a pin 2S, whichenters a perforation in the adjacent ring, and the rings are thusprevented from relative rotation. The rings are somewhat smaller indiameter than the grooves 18, as plainly shown in the drawings, so thatthe rings are capable of movement perpendicular to the axis of thebearing in order to compensate for any inequality in the piston-rod 11.This movement, however, is so slight that there will be scarcely anywear between the rings or between the rings and the casing, andconsequently no adjustment is needed to compensate for such wear. Thestructure of the rings enables the springs 24 to compensate for any wearbetween the parts 2O and the piston-rod 11. In order to provide asteamtight joint between the casing and the Stilll- IOO IIO

ing-box 6, l provide one end of the casing with a groove 26 and placebetween such groove and the corner of the stuling-box a suitable packing27-such, for instance, as lead wire.

l am aware that it has heretofore been proposed to make a packing inwhich a number of expansible rings were placed side by side in a casing,each ring being composed of two superimposed rings of separable parts,the two superimposed rings being either concentric or eccentric. Theobjection to such packing, however, is that the joints between the twosuperimposed rings must either coincide or must cross each other at twopoints, or they must cross the adjoining joints of the parts of thering. Another objection to such construction is that when the inner ringis worn by friction against the piston-rod the joint between the tworings will not coincide. The obj ect of my present invention is toovercome the above objections.

Having fully described my invention, what l claim as new, and desire tosecure by Letters Patent of the United States, is-

l. ln a packing for piston-rods or the like, the combination with acasing formed of two semicylindrical parts, a plurality of groovesformed in both parts of said casing, a spline set into said casingacross the line of junction of the two parts to prevent relativelongitudinal movement between said parts, and a pair of expansible ringsarranged side by side in each groove, each ring being composed of aplurality of separable parts, the junction of one ring facing the solidparts of the adjacent ring.

2. ln a packing for piston-rods or the like, the combination with acasing formed of two semicylindrical parts, of a plurality of groovesformed in both parts of said casing, a pair of splines set into saidcasing across the line of junction of the two parts at opposite sidesand opposite ends to prevent relative longitudinal movement between saidparts, and a pair of eXpansible rings arranged side by side in eachgroove, each ring being composed of a plurality of separable parts, thejunction of one ring facing the solid parts of the adjacent ring.

ln testimony whereof l have hereunto set my hand and affixed my seal inthe presence of the two subscribing witnesses.

ED. BADER. [L. s.] Witnesses:

WV. A. ALEXANDER, BENNETTE PIKE.

